JPH0135565Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention relates to a DC motor having a circuit within the DC motor that easily controls the rotational direction of the motor in forward and reverse directions.

(Prior Art) As a DC motor used to drive a fan or radiator for blowing out temperature-controlled air into a vehicle interior, or a fan for cooling a condenser, there is a type shown in Fig. 1. . A main shaft 1 to which a fan (not shown) is attached is rotatably supported by a bearing 2, and an armature 5 is fixed to the main shaft 1 via a hub 4.
A brush holder 7 is fixed to the casing 3 by a rocker support 6, and a brush 8 supported by the brush holder 7 is in contact with a commutator 9 formed at the center of the armature 5. When the brush 8 contacts the commutator 9, current is supplied to the armature 5, and the armature 5 rotates by cutting off the magnetic field formed by the magnet 10 fixed to the casing 3. A coil spring 11 is housed in the brush holder 7 for imparting a resilient force toward the armature 5 to the brush 8. Incidentally, the casing 3 is composed of a first bracket 3a and a second bracket 3b.

Although only one brush 8 is shown in FIG. 1, there are two brushes 8 on the positive side and negative side.
is provided. The brush 8 is electrically connected to a power source (not shown) via a lead wire 12.

(Problem to be solved by the invention) One method of switching the rotation direction of the main shaft 1 of such a DC motor between forward and reverse is to change the power supplied to the brush 8 between the positive side and the negative side. . The fans used in automobile air conditioners often rotate in opposite directions for right-hand drive cars and left-hand drive cars, so it is possible to use the same type of DC motor to apply to both vehicles. Conventionally, the two lead wires 12 are colored in different colors so that each lead wire 12 is connected to the power terminal required for the vehicle when the vehicle is assembled. in many cases.

However, when assembling a DC motor into a vehicle, if the wiring necessary for the vehicle is connected in this way, there is a problem in that work efficiency is significantly hindered.

The present invention has been made to solve the problems of the prior art described above, and an object thereof is to provide a DC motor that improves workability when assembling the DC motor.

[Structure of the invention] (Means for solving the problem) The present invention to achieve the above object includes a commutator attached to a main shaft rotatably supported in a casing, and a positive side and a negative side that contact the commutator. In the DC motor in which two brushes are attached to the casing, the coupler is provided with a positive leg piece connected to the positive side power source and a negative side leg piece connected to the negative side power source, and the coupler or the cooling hose is provided. Alternatively, two windows are formed in the casing, with which the blind plugs are removably engaged, and when the coupler is attached to one of the windows, the one brush and the positive leg are electrically connected, When the coupler is attached to the other window, a first connection terminal for connecting the one brush and the negative leg piece is installed in the casing, and when the coupler is attached to one of the windows, the first connection terminal is attached to the casing. A second connection terminal is provided in the casing to connect the other brush and the negative leg piece, and to connect the other brush and the positive leg piece when the coupler is attached to the other window. It is a DC motor that is installed.

(Function) With the DC motor configured in this way, each brush can be connected to the positive power supply or the negative power supply by simply selecting the window to which the coupler is connected. It can be used for either clockwise or counterclockwise rotation, which simplifies the work when assembling the DC motor.

(Example) Next, an example of the present invention will be described based on FIGS. 2 and 3. In FIG. 2, only the second bracket 3b of the casing 3 is shown.

Coupler 13 for supplying current to the DC motor
is the positive side leg piece 14 connected to the positive side power supply.
and a negative side leg piece 15 which is perpendicular to this and is connected to the negative side power source are attached through the coupler body 16, and the coupler body 16 is provided with a claw portion 17. By connecting a coupler (not shown) provided on the vehicle side to this coupler 13, it can be easily used as a motor for left and right rotation.
Further, direct wiring may be connected to the coupler 13 by soldering or the like.

Two windows 18 and 19 are formed in the second bracket 3b constituting the casing 3 of the DC motor, and the coupler main body 16 can be attached to and detached from either of the windows 18 and 19 by engaging the claws 17. It is becoming. If one window 18 is for left rotation, the other window 19 is for right rotation, and letters L and R are attached near the windows 18 and 19 to indicate this. .

The state of the wiring built into the casing 3 of the DC motor is shown in FIG. 3, with the first connection terminal 20 electrically connected to one brush 8a.
and a second brush electrically connected to the other brush 8b.
A connection terminal 21 is attached within the casing 3.

The first connection terminal 20 has two connection terminals 20
a, 20b, and the second connection terminal 21 has 2
It has two connection terminals 21a and 21b. Moreover, the connection terminal 20a and the connection terminal 20b, and the connection terminal 21a and the connection terminal 21b are electrically connected, respectively. The brush 8a is connected to the first connection terminal 20.
Similarly, the brush 8b is electrically connected to an arbitrary position of the second connection terminal 21. Therefore, coupler 13 is connected to either of the pair of connection terminals.
If the legs 14 and 15 of the brush 8 are connected, the brush 8
Current is supplied to a and 8b.

A total of four connection terminals are provided in this way, and among the four connection terminals, two connection terminals 20a and 21a are connected to different brushes.
and become a pair of positive and negative, and the two connection terminals 20b and 2
1b form a positive and negative pair, and the respective window portions 18,
It is facing 19.

When the coupler 13 is attached to one window 18, one brush 8a is electrically connected to the positive leg piece 14, and the brush 8b is electrically connected to the negative leg piece 15. When the coupler 13 is attached to the other window portion 19, one brush 8a is electrically connected to the minus side leg piece 15, and the brush 8b is electrically connected to the plus side leg piece 14.

Of the two window sections 18 and 19, the one to which the coupler 13 is not attached has a cooling hose 2 for introducing air to cool the inside of the DC motor.
5 is connected. This cooling hose 25 is provided with a claw portion 22, which is connected to the window portions 18 and 19.
It can also be attached and detached by engagement of the claw portion 22.

For example, in the case of a fan that blows temperature-controlled air into the vehicle interior, some of the air from the fan connected to the fan case is introduced into the motor to cool the DC motor and improve efficiency. It is planned.

On the other hand, when cooling the DC motor is not required, in order to prevent dust from entering the DC motor, the window portions 18 and 1 to which the coupler 13 is not attached are
9 is provided with a blind plug having a claw portion that removably engages with the window portions 18 and 19.

Therefore, in the case of a clockwise rotating motor, when the coupler 13 is attached to the window 19 as shown in FIG. 3A, the brush 8b is brought into conduction with the positive power source, and the brush 8a is brought into conduction with the negative power source. Conversely, when using a left-handed rotating motor, attach the coupler 13 to the window 18 on the opposite side as shown in FIG. 3B.
Brush 8b is connected to the negative power supply, and brush 8
a is in a conductive state with the positive power supply, and the rotation direction of the motor is opposite to that described above.

FIG. 4 is a diagram showing another embodiment of the present invention, and the same members as those shown in FIG. 3 are given the same reference numerals.

In this embodiment, the coupler 13 and the lead wires 23, 24 are integrated, one end of the lead wire 23 is connected to the negative side leg piece 15, and one end of the lead wire 24 is connected to the positive side leg piece 14. wired. If the ends of the lead wires 23 and 24 are connected to rotate the motor in the right direction as shown in FIG.
0a, and connect the tip of the lead wire 24 to the connecting terminal 2.
Connect to 1b. When rotating in the opposite direction, the tip of the lead wire 23 is connected to the connection terminal 21b, and the tip of the lead wire 24 is connected to the connection terminal 20a, as shown in FIG. 4B. In this case as well, the coupler 13 can also be shared.

In this way, by forming a circuit that controls rotation in both forward and reverse directions in the DC motor, and selecting only the windows 18 and 19 to which the coupler 13 is connected, the same type of DC motor can be rotated clockwise or counterclockwise. It is possible to improve the workability when assembling the DC motor. Furthermore, when using either a right-handed or left-handed DC motor, it goes without saying that the casing 3 can be shared, and furthermore, the rocker support, coupler 13, etc. can be shared.

[Effects of the invention] As explained above, the present invention provides a coupler with a positive leg piece connected to a positive side power source and a negative side leg piece connected to a negative side power source, and the coupler or the cooling hose. Alternatively, two windows are formed in the casing with which the blind plugs are removably engaged, and when the coupler is attached to one of the windows, one brush and the positive leg are electrically connected, and the other window is connected to the coupler. When the coupler is attached to the window, a first connection terminal is installed in the casing to connect the one brush and the minus side leg piece, and when the coupler is attached to one of the windows, the first connection terminal is attached to the other brush. and the minus side leg piece, and a second connection terminal is installed in the casing to make the other brush and the positive leg piece electrically conductive when the coupler is attached to the other window. Since it is a DC motor, by sharing the rocker support, coupler, etc., and changing only the connection point of the coupler, it is possible to apply the same type of DC motor to both clockwise rotation and counterclockwise rotation. This has a great practical effect of improving workability when assembling a DC motor.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing an example of a DC motor, Fig. 2 is a perspective view showing a casing of a DC motor according to an embodiment of the present invention, and Fig. 3 is a diagram showing the wiring state of the present invention. The schematic diagram shown in FIG. 4 is a schematic diagram showing a wiring state of a DC motor according to another embodiment of the present invention. 1...Main shaft, 3...Casing, 8a, 8b...
...Brush, 9...Commutator, 13...Coupler, 14...Plus side leg piece, 15...Minus side leg piece, 16...Coupler body, 17...Claw portion, 1
8, 19...Window part, 20...First connection terminal, 21
...Second connection terminal, 20a, 20b, 21a, 2
1b... Connection terminal, 25... Cooling hose.

Claims (1)

[Claims for Utility Model Registration] Main shaft 1 rotatably supported within casing 3
In a DC motor, a commutator 9 is attached to the casing 3, and two brushes 8a, 8b on the positive side and a minus side that contact the commutator 9 are attached to the casing 3. Minus side leg piece 15 connected to side power supply
The coupler 13 is provided with two windows 1 with which the coupler 13, the cooling hose 25, or the blind plug is removably engaged, respectively.
8 and 19 are formed in the casing 3, and when the coupler 13 is attached to one of the windows 18, the one brush 8a and the positive leg piece 14 are electrically connected, and the other window 19 is connected to the coupler 13. When the coupler 13 is attached, the first connection terminals 20, 20a, 20b for electrically connecting the one brush 8a and the minus side leg piece 15 are installed in the casing 3, and the coupler 13 is attached to one of the windows 18. When the coupler 13 is attached to the other window portion 19, the other brush 8b and the minus side leg piece 15 are electrically connected, and when the coupler 13 is attached to the other window portion 19, the other brush 8b and the plus side leg piece 14 are electrically connected. A DC motor in which second connection terminals 21, 21a, and 21b are installed in the casing 3 for conducting.